The world's largest yachts 2013

More From Inside Wealth

14. Katara

Length: 408 feetTop speed: N/ATotal power: N/A

Katara is a mystery among the super yachts, as details about the interior and owner have been kept fairly secret. The 408-foot behemoth was launched in April 2010 and was known as Project Crystal while being built.

It was built in Germany by Lurssen Yachts’ in-house naval architects and was designed by Monaco’s Espen Oeino Naval Architects.

The super yacht is worth an estimated $300 million and flies the Qatari flag.